Finding the Fourth Proportional to 3,667.70, 5,061.43 and 1,989.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.70 : 5,061.43 = 1,989.11 : x
2. Step 2: Convert to fraction form
   3,667.70/5,061.43 = 1,989.11/x
3. Step 3: Cross multiply
   3,667.70x = 5,061.43 × 1,989.11
4. Step 4: Simplify right side
   3,667.70x = 10,067,741.03
5. Step 5: Solve for x
   x = 10,067,741.03/3,667.70
6. Step 6: Final answer
   x = 2,744.97